Local Rocks and Minerals
of the San Gabriel Mountains

As I collect rock and mineral specimens from here in the San Gabriel Mountains, I am sending samples to Cannon Microprobe laboratory for elemental analyses and identification (Scanning Electron Microscope and possibly some X-Ray Diffraction when I can afford it).

Here I post rock/mineral photos and the accompanying spectra plots that tell you which elements (Elements 1-10 aren't found due to limitations in the equipment) are found in the specimen.

Rhodonite (red coloration)

Spessartine Garnet (yellow coloration)

Quartz (clear coloration)

Mn Oxide and Gageite

Actinolite (green flecks in matrix)

Albite? (white mineral)

Amphibole or Chlorite (green material)

Calcite (white material)

Rhodonite (reddish material)

Actinolite

Actinolite

Tremolite

Feldspar var. Albite (white chunks)

Ferrian Magnesite (tan chunks)

Amphibole and Serpentine (in matrix)

Amphibole and Serpentine (in matrix)

Amphibole and Mica var. Muscovite

Mica var. Biotite (black matrix)

Feldspar var. Albite (white chunks)

Epidote-Zoisite

Iron Hydroxide (rust)

Chlorite

Spessartine Garnet (yellow material)

Actinolitic Asbestos

Epidote? (matrix and brown crystals)

Epidote? (matrix and brown crystals)

Ferroan Dolomite (gray material)

Epidote? (green material)

Chlorite

? (dark nodules)

Biotite altering to Chlorite? (dark nodules)

Quartz (white layers)

Brown Layers--unknown

Brown Layers--Fe, Mn, Ca Silicate

Epidote and Calcite (green material)

Albite (white material)

Gneiss--Xenotime (Yttrium Phosphate)--black layers

Biotite Mica--black layers

Plagioclase Feldspar--black layers

Plagioclase Feldspar--white layers

Biotite Mica--white layers

Ca, Fe, Mg, Si (green crystals--Epidote?)

Albite is in the dark matrix

Marble

Serpentine

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